Samara89 Samara89

15-04-2017
Mathematics

contestada

Suppose a2 + 4a + 3 represents the area of a rectangle. What is the perimeter of that rectangle? A) 2a + 4 B) 4a + 8 C) 6a + 12 D) 8a + 16

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Olivia123456 Olivia123456

15-04-2017

a² + 4a + 3
(a+3)(a+1) This is the length and the width of the rectangle.

Perimeter = length + length + width + width
P = (a+3) + (a+3) + (a+1) + (a+1)
P = a + a + a + a + 3 + 3 + 1 + 1
P = 4a + 6 + 2
P = 4a + 8

B) 4a + 8

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